Variability of Measurement of Patellofemoral Indices with Knee Flexion and Quadriceps Contraction: An MRI-Based Anatomical Study.

Purpose: The purpose of this study was to investigate the impact of varying knee flexion and quadriceps activity on patellofemoral indices measured on magnetic resonance imaging (MRI).

Materials And Methods: MRI of the knee was performed in 20 patients for indications other than patellar or patellofemoral pathology. Axial and sagittal sequences were performed in full extension of the knee with the quadriceps relaxed, full extension of the knee with the quadriceps contracted, 30° flexion of the knee with the quadriceps relaxed, and 30° flexion with the quadriceps contracted.

A Modification of the Dunn Osteotomy With Preservation of the Ligamentum Teres.

Background: We aimed to determine if a modified Dunn osteotomy could be safely performed without surgical dislocation and consequent preservation of the ligamentum teres.

Methods: All patients undergoing a modified Dunn osteotomy for a slipped capital femoral epiphysis over an 8-year period were included in this study, and all had a severe slip with an open physis.

Results: The modified Dunn procedure was performed on 34 hips in 34 patients.

Efficacy of using an air arthrogram for EUA and injection of the hip joint in adults.

Aim: Hip arthrography usually requires the injection of iodine based dyes which can cause complications. We wanted to determine the accuracy of using air for hip arthrography.

Method: A prospective study was undertaken including all adults who had a hip arthrogram.

Computed tomography review of tarsal canal anatomy with reference to the fitting of sinus tarsi implants in the tarsal canal.

Sinus tarsi implants are used in the treatment of symptomatic hyperpronating flexible flatfeet in children. Although some implants are inserted only into the sinus tarsi, others occupy both the sinus tarsi and the tarsal canal. The stem that is anchored in the tarsal canal depends on interference fit for the initial resistance to slippage.